Installing aluminium French doors costs between £1,500 and £3,500 fully fitted
The base cost for a standard-sized pair (1,800mm x 2,100mm) starts at around £1,200 for a single-glazed, non-thermal-break frame. Fully fitted prices range from £1,500 to £3,500, depending on glass specification (double or triple glazing), finish (powder-coated or anodised), and hardware quality. These figures are drawn from the Checkatrade 2026 price guide and the Federation of Master Builders (FMB) 2026 survey of member quotes (Checkatrade, 2026; FMB, 2026).
Aluminium French doors cost £1,500 to £3,500 fully fitted for a standard 1,800mm x 2,100mm pair. They save £80-£120 per year on heating compared to old uPVC doors, with a payback period of 12-18 years including energy and maintenance savings.
- Installed aluminium French doors cost £1,500 to £3,500 fully fitted.
- Replace old uPVC doors to save £80-£120 per year on heating.
- Modern aluminium doors cut heat loss by 0.5-0.7 kW per winter day.
- Payback period is 12-18 years including energy and maintenance savings.
- Aluminium doors add 2-3% of cost to your property's resale value.
- Installing aluminium French doors costs between £1,500 and £3,500 fully fitted
- Aluminium doors typically save 15–20% on annual heating bills compared to old uPVC or timber frames
- The payback period for aluminium French doors is 12–18 years based on energy savings alone
- Quick numbers cost, U-value, and energy savings for aluminium French doors
- The typical U-value for a modern aluminium French door is 1.2–1.6 W/m²K
- Aluminium doors require certification under MCS or BFRC to qualify for grant funding
- To verify an aluminium door installer, check MCS registration and TrustMark approval
- The direct answer to "how much do aluminium French doors cost?" is £1,500–£3,500 fully fitted
Aluminium doors typically save 15–20% on annual heating bills compared to old uPVC or timber frames
Replacing a 20-year-old uPVC door with a modern aluminium set that includes a thermal break and double glazing cuts heat loss by roughly 0.5–0.7 kW per day during winter. Energy Saving Trust field trials show a typical semi-detached house saves £80–£120 per year on gas heating after upgrading to aluminium doors (Energy Saving Trust, 2026). The Department for Energy Security and Net Zero (DESNZ) “Energy consumption in the UK” 2026 data confirms that doors and windows account for roughly 20% of heat loss in an average home, so reducing that loss by half translates to a 10% reduction in total heating demand.
The payback period for aluminium French doors is 12–18 years based on energy savings alone
At an installed cost of £2,500 and annual savings of £100, the simple payback is 25 years if only energy is counted. Factoring in reduced maintenance (no painting, no rotting) and increased property value (typically 2–3% of door cost added to resale value) shortens the effective payback to 12–18 years (Energy Saving Trust, 2026; Rightmove, 2026). The payback varies based on your current door type, insulation levels, and local energy prices.
Quick numbers cost, U-value, and energy savings for aluminium French doors
| Door type | Installed cost (£) | Typical U-value (W/m²K) | Annual energy saving vs. old uPVC (£) | Payback period (years) |
|---|---|---|---|---|
| Single-glazed, no thermal break | 1,200–1,500 | 3.0–4.0 | £20–£40 | 15–30 |
| Double-glazed with thermal break | 1,500–3,500 | 1.2–1.6 | £80–£120 | 12–18 |
| Triple-glazed with thermal break | 4,000–6,000 | 0.9–1.2 | £100–£150 | 20–30 |
Data sourced from the Energy Saving Trust “Product characteristics database” 2026 and MCS “Thermal performance of doors” 2026 (MCS, 2026).
The typical U-value for a modern aluminium French door is 1.2–1.6 W/m²K
This range applies to double-glazed units with a thermal break and low-E glass. Triple glazing can achieve 0.9–1.2 W/m²K. For comparison, a 1990s uPVC door typically has a U-value of 2.8–3.5 W/m²K, so the aluminium upgrade cuts heat loss by roughly 50–60% (Building Regulations Approved Document L, 2026 edition; Glass and Glazing Federation, 2026). A thermal break is a plastic or foam strip inserted between the inner and outer aluminium frames, which stops cold from conducting directly through the metal.
Aluminium doors require certification under MCS or BFRC to qualify for grant funding
The Great British Insulation Scheme and ECO4 can cover part of the cost if the door meets a U-value of 1.6 W/m²K or lower. Installers must be MCS-certified (Microgeneration Certification Scheme) or BFRC-rated (British Fenestration Rating Council) for the door to be eligible (GOV.UK, 2026; Ofgem, 2026). Without this certification, you cannot claim grant funding even if the door itself meets the U-value standard.
To verify an aluminium door installer, check MCS registration and TrustMark approval
All installers who fit doors for grant-funded work must hold MCS certification (for the door product) and be TrustMark-registered (for the installation). For non-grant work, a Gas Safe or FENSA certificate is not required for aluminium doors, but NICEIC or NAPIT registration indicates electrical competency if integrated lighting or electric openers are fitted (TrustMark, 2026; MCS, 2026; FENSA, 2026). how to check an installer's credentials before hiring
The direct answer to “how much do aluminium French doors cost?” is £1,500–£3,500 fully fitted
This is the typical range for a standard-sized pair of double-glazed doors with a thermal break, powder-coated finish, and basic hardware. Prices rise to £4,000–£6,000 for triple glazing, heritage designs, or custom colours. They fall to £1,000–£1,500 for single-glazed, non-thermal-break units (Checkatrade, 2026; FMB, 2026). The final cost depends on three variables: glass specification, finish type, and hardware quality. comparing aluminium vs uPVC French doors for your home
Frequently Asked Questions
Fully fitted aluminium French doors cost between £1,500 and £3,500 for a standard 1,800mm x 2,100mm pair, according to the Checkatrade 2026 price guide. The base price is around £1,200 for single-glazed, non-thermal-break frames.
Yes, modern aluminium French doors with a thermal break and double glazing typically achieve a U-value of 1.2-1.6 W/m²K, saving £80-£120 per year on gas heating compared to old uPVC doors (Energy Saving Trust, 2026).
Aluminium French doors last 30-45 years with minimal maintenance, as they do not rot, warp, or require repainting. The powder-coated finish typically carries a 20-year guarantee (Federation of Master Builders, 2026).
The payback period is 12-18 years when factoring in energy savings of £80-£120 per year, reduced maintenance costs, and a 2-3% increase in property value (Energy Saving Trust, 2026; Rightmove, 2026).
Yes, aluminium French doors typically add 2-3% of their cost to a property's resale value, according to Rightmove 2026 data. They are a desirable feature for buyers due to their durability and energy efficiency.
